Problem (Issue) Statement: | How to Troubleshoot RS-485 Communication Issue | ||
Description: | A majority of MicroEngine's controllers and IO extension boards support RS-485 communication. The RS-485 communication is a rugged, multi-drop serial data path that allows multiple devices to be connected with individual addresses for each device. During installation, users will be following the general guide for RS-485 communication to install and terminate the hardware. However, the RS-485 communication system might still present some issues. After observing most of the issues reported at site, the common cause of the issues are software setting errors, hardware configuration setting errors, loose wiring termination and even reversed cable polarity termination which affects the RS-485 communication reliability. | ||
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Related Hardware: |
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System Application: | NIL | ||
Symptom and Finding: | NIL | ||
Cause: | NIL | ||
Solution: | Summary:
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This step is important to double and even triple check the wiring installations because even if a wire looks like it is properly connected, it may not necessarily be so. |
Step 7: Check wiring termination polarity. Even the most skilled technicians can sometimes make a simple wiring mistake. Refer to the label shown on the controller board or IO board and be certain that you have terminated the wiring according to the correct polarity.
Figure 6: Check and Ensure that the Wiring Termination Polarity is Correct
Step 8: If nothing worked to solve the problem, users can refer to the wiring guideline for RS-485 to proceed with the second troubleshooting guideline.
User may refer TIKBxxx- A Wiring Guidelines for RS-485 network to solve the RS485 issue/ problem. |
Common Issue
NIL
Date Documentation:
12/11/2018 (Rev 2.0)
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